The vatican should have its own prison for these criminals who are out of the reach of civil law.
Out of reach of civil law? He should be in jail and should have been for years.
There used to be monastic jails (or "penitentiaries") for priests and religious, who were sent there to live very harsh lives and repent. I knew a European priest who had been sent to one in his home country in the early 60's after he had been seen walking unaccompanied on the street with a woman and there had been rumors - accurate, alas - about his dealings with women parishioners. He said it was a horrible experience and he had never wanted to go back there, and he actually did clean up his behavior. (Well, until they closed the penitentiaries after VatII and went to the therapeutic model...)